on my 3 tt's i use -2- CS Port IME1 units, and 1 DS Audio Ion 001. the DS Audio is a bit more effective, but much more difficult to position effectively. it's about how your shelf and plinth are positioned, which one works better.
both of these units are set and forget. meaning during a session i can turn them on and not think about it. the DS Audio unit warns you not to leave it on all the time as the product has a limited time life. my habit is to turn off the units when that tt is not playing.
a humidifier could wreak havoc with circuitry, so use one with discretion. nothing that should be constant. ventilate your room when possible if you do use a humidifier frequently.